AXS features a two-button design that transforms the crucial act of rider inputs into a more personal experience for all your AXS controls GX Eagle TType rear derailleur mounts around the wheel axle itself, contacting the cassette directly with a first-of-its-kind Hangerless Interface GX Eagle TType derailleur offers the same intuitive pairing and set-up procedure as SRAM's Eagle AXS derailleurs GX Eagle TType derailleur features things like removable skid plates for better protection and serviceability Shifting under load is made possible on the GX Eagle TType cassette due to a combination of X-SYNC technology and cassette mapping, creating seamless shifts even during your hardest power output Groupset includes: AXS POD Electronic Controller w/ Clamp GX Eagle TType AXS rear derailleur w/ battery GX Eagle TType XS-1275 10-52t cassette 34 tooth chainring with Aeroguard GX Eagle TType 126 Link 12-Speed Flattop chain Battery charger and cord Crank arms not included